The „Gembird energenie EG-PM1W-001“ is a IP-Plug thus you could control a power-plug by your wlan. Additionally its a wlan repeater.

Most of compareable devices are „just“ App-based (so controlable by mobiles), have no(!) webinterface and are closely connected to a vendor-cloud.
The EG-PM1W-001 is NOT … it has a webinterface and of couse could easily be controlled using curl. Here is how: